Assume that your plugin requires a minimum version of PHP and you want to prevent activation if the minimum PHP version isn’t met.

Add the following code after you’ve declared your namespace, checked to make sure the plugin isn’t being directly accessed and so on:

if (version_compare(PHP_VERSION, '7.4', '<')) {
            'The plugin requires PHP 7.4 or higher. Your WordPress site is using PHP %s.',

If the comparison fails, then an error message will be displayed on the plugin activation screen along with the string you’ve passed to the sprintf function.